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25th International Symposium on Lattice Field Theory (Lattice2007), Regensburg : Allemagne
Moments of meson distribution functions with dynamical twisted mass fermions
R. Baron1, S. Capitani, J. Carbonell2, K. Jansen, Z. Liu3, O. Pène3, C. Urbach
ETM Collaboration(s)

We present our preliminary results on the lowest moment hxi of quark distribution functions of the pion using two flavor dynamical simulations with Wilson twisted mass fermions at maximal twist. The calculation is done in a range of pion masses from 300 to 500 MeV. A stochastic source method is used to reduce inversions in calculating propagators. Finite volume effects at the lowest quark mass are examined by using two different lattice volumes. Our results show that we achieve statistical errors of only a few percent. We plan to compute renormalization constants non-perturbatively and extend the calculation to two more lattice spacings and to the nucleons.
1 :  DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
2 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 :  LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
Physique/Physique des Hautes Energies - Réseau
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